Cone-grinding attachment for emery-wheels



' UNITED STATES PATENT OFFICE.

v GEORGE L. JoNEs, OF MUNCIE, INDIANA.

CONE-GRINDING ATTACHMENT FOR EM ERY-WHEELS.

SPECIFICATION forming part of Letters Patent No. 689,192, dated December 17, 1901.

Application filed August 3. 1900. Renewed October 12, 1901. Serial No. 78,475. No model.)

To all whom it may concern.-

Be it known that I, GEORGE L. J one, a citizen of the United States, residing at Muncie, in the county of Delaware and-State of Indi ana, have invented a new and useful Gone- Grinding Attachment for Emery-Wheels, of which the following is a specification.

The aim and purpose of this invention is to provide an attachment capable of being easily and quickly attached to or detached from an emery-Wheel of the ordinary mounting and construction, so that the article to be ground can be revolved with the emerywheel. It is the purpose to apply the attachment to the ernery-wheel-actuating means when in use, and whennot in use to detach the same and allow the emery-wheel to be used for ordinary purposes. The attachment can be applied to the mechanism of any ordinary emery-wheel without altering the mechanism thereof with the exception of placing a gear-wheel on the end of the emerywheel-actuating shaft on the opposite end of the emery-wheel. It will be noticed that the gear-wheel is placed upon the end of the emery-wheel shaft outside of the-standards. The gear-wheel can be placed on the shaft of any double-spindle emery-wheel mechanism without in the least'aflfecting the mechanism or changing the location of the supportingstandards or drive-pulley.

Another object is to provide an attachment with flexible gearing, so that the article to be ground can be held at any angle to the emerywheel and with any amount of pressure or entirely removed from the wheel.

A further object is to provide the attachment with removable work-holding mandrels to hold different articles to be ground.

A still further object is to provide an attachment simple in construction, so as not to get out of order, a'nd'one that can be easily operated.

These and other objects not hereinbefore mentioned are accomplished by the construction illustrated in the accompanying draw ings, wherein like letters ofreference indicate corresponding parts in the several views, and in which- Figure Tie a top plan' view of an emerywheel and its mountings with my attachment' applied thereto. Fig. 2 is a side eleva table by means of the standards B.

C designates a pulley for revolving the wheel.

The parts already described are of the usual construction.

On the opposite end of the shaft from the emery-wheel is secured a friction-wheel D. The wheel has its friction-surface D concave for a purpose hereinafter described. The placing of this friction-Wheel D on the end of theemery-wheelshaft is the only change necessary to apply my attachment to the emery-Wheel-actuating mechanism.

g E designates a shaft extending at an angle from the shaft B. One end of this shaft E is supported by the post E. The lower end of this post is pivoted to the free end of an arm E", which in turn has its opposite end pivoted to the post F, extending upwardly from the plate F, which is rigidly secured to the table under the friction-wheel D.

On the end of t'he'shaft E beyond the post Efis a friction-wheel G, which is adapted to have frictional contact at all times with the frictionalwheelD. AboltFextendsthrough a slot F' in the plate F down through the table. The upper end of the boltis provided with a hand-nut F" for holding the plate to the table.

H is a coiled spring having its upper end secured to the upper portion of the post E and its lower end secured to the arm E, adjacent its pivotal point on the plate. The purpose of this spring is to always keep the friction-wheels G and D in contact when the alinements of the shaftsE and B are changed,

as hereinafter described. The opposite end' of the shaftE is mounted on a slidable standard. This standard consists of a plate I, which is not connected to the table and is adapted to be slid over the table at'will by Extending up from the slid the operator. able plate I is a standard I. This standard I supports a casting K, which is held in adjustable heights from the plate I by means of the set-bolt I. The casting K is provided tachment is in use, notwithstanding what anwith three parallel upwardly-extending arms L, L, and M, respectively. The arms L and L extend up the same height and have jour naled thereon a shaft N, which extends at an angle to'the shaft E and also to the shaft B. On the end of the shaft beyond the arm L is secured a friction-wheel N. Pivoted to the upper end of the arm M is a horizontal arm 0. This arm is secured in place by means of the nut O. The free end of this arm has pivoted thereto an upright post P, which supports the end of the shaft E.

R designates a friction-wheel secu red to the shaft E by means of the spline R. This wheel R is adapted to have frictional contact with the friction-wheel'N. which is provided with an annular groove N" for that purpose.

The opposite end of the shaft N is hollowed out and is adapted to hold the work-holding mandrel S. This mandrel is secured in the shaft by means of the set s'crew S. On the end of the mandrel is screwed the cone '1, which is to be ground.

By referring to Fig. 3 itwill be seen that the outer end of the inandrei is provided with screw-threads S", on which thercone is adapted to be screwed. As all cones are not provided with the same pitch of thread, I make the mandrels detachable, so that I can have a mandrel with a thread to fit any cone. By making the mandrels readily detachable I provide an attachment which is especially valuable for this class of work. i

U designates a coiled sprin g surrounding the post M. This spring is provided with an extension U, having its end bearing against the arm 0 for pressing the wheel R against the wheel N. l N

In the operation of the device the frictionwheel D will revolve the friction-wheel G and theshaft E, which will revolve the wheel R and wheel N and shaft N, carrying the cone to be revolved. As the shaft E has a pivotal connection with its support and the said shaft is also pivoted at the other end to the standard carrying the shaft N, it will be seen that the cone can be readily redrawn from the emcry-wheel B or that the pressureof the cone against the emery-wheel can be'varied at will by simply moving the sliding standard over the table. By mounting thefriction-wheel R on the shaft E and providing the wheel N with the annular groove N the two wheels will always be in frictional contact. By having thefriction-wheels, which are in contact with each other, held together by springs I am enabled to vary the relative position of the shafts at will and at the same time always have a. positive contact between the wheels, so that there is no danger of the coneever stopping wheuagainst the emery-wheeLtherebydamaging the cone. There will always be enough friction between the parts to make the cone revolve. It will be noticed that the wheels D and G, being held together by a spring, will always be in contact when the atgle the two shafts B and E may assume in relation to each other. This I regard as an 1mportant featu re of my invention,for the reason that to properly grind a cone it is necessary to allow considerable play between the shafts N and E and also between the shafts E and B. Another reason why this yielding contact between these two wheels is desirable is that all emery-shaft wheels are not the same length or are the emery-Wheels the same in diameter, and for that reason the two shafts E and B vary greatly in their relative positions, and

supported that it can be readily moved to or from the emery-wheel, it is necessary and essential that there must be used flexible gearing connected with the wheel D for rotating the cone. It is also essential that the shaft carrying the cone must be a shaft mounted on a slidable but rigid standard ofsomekind, so that the cone can be properly guided to the emery-wheel. By supporting'the shaftcarrying the cone on a standard the shaft is supported, and the operator-can use both hands to move the cone to the emery-wheel. As it requires some skill and attention to hold the cone to the emery-wheel not onlyin the proper position, but also with the proper pressure, it is quite necessary that the operator should have the use of both of his hands.

By positioning the pivotalpoint of the arm E directly under the concave portion D of the friction-wheel D, as shown in dotted lines,.

can be removed and the emery-wheel used without it for other kind of Work, if so desired. The post F, carrying the arm E", and post E can be made adjustable in height, if desired. t

I am aware that many minor changes can be made in the construction and arrangement of parts without in the least departing from the nature and principles of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is.

1. In a work-holdin g attachment fore merywheels, the combination with a gear-wheelon the emery-wheel shaft, of a movable-shaft E extending at an angle to the emery-wheel shaft having one end pivotally secured toa fixed support, the fixed support being located adj acent'the wheel on the emery-wheel shaft, a gear-wheel on that end of the shaft coacting with the gear-wheel on v the emery-wheel shaft, a spring for positively holding the two wheels together and atany angle that the two shafts may assume in relation to each other, a slidable standard, a shaft Ncarried by the standard, at an angle to the other shafts, the shaft E having one end pivoted to the standard, coacting gear-wheels on theends of the shafts E and N, springs forholding the wheels together, the wheel on the shaft E being splined thereon, and a work-holder on the opposite end of the shaft N. i

' port, and a gear-wheel on the end of the shaft 2, In a work-holding attachment for emerywheels, the combination with a slidable stand: ard adapted to be moved over a suitable support, a shaft mounted thereon, awork-holder on one end of the shaft, a frictional gearwheel on the opposite end of the shaft pro.-

vided with an annular groove, a shaft Ehaving one end pivoted to the slidable standard, a frictional gear-wheel splined thereon coacting with the gear-wheel on the other shaft, and bearing inthe annulargroove' thereof, a

spring for holding the two gearwheels together, the opposite endof the shaft E'adapted tobe pivotally supported on a suitable supadapted to berevolved by the emery-wheel shaft.

3. Inawork-holdingattaclrlnent'foremerywheels, the combination with a'g'ear-wheel on the end of the emery-wheel shaft provided with a concave surface, an arm pivoted to a suitable support under the gear-wheel, its pivotal point being directly under the concave portion of the gear-wheeh a'post extending from the arm and pivoted thereto, ashaft having one end mounted thereon, a gear-wheel on the end of the shaft adapted to coact with the gear-wheel on the emery-wheel shaft,

means for holding the wheels together, a slidable standard a workholding shaft journaled thereon, and flexible gearing connecting the two shafts together. i

4. In a work-holding attachment for grind-v ing-wheels, the combination with a gear-wheel on the end of the grinding-wheel shaft, the

gear-wheel being on the end opposite from the grinding-wheel ,of a slidable standard adapted to be moved over a suitable support adjacent the grinding-wheeh'a shaft journaled thereon, a work-holder on one end of the shaft, and flexible gearing connecting the other end of the shaft with the gear-wheelon the end of the grinding-wheel shaft.

5. In a work-holding attachment for grinding-wheels, the combination with a gear-wheel on the end of the grinding-wheel shaft, the gear-wheel being on the end opposite from the grinding-wheel,of a slidable standard adapted to be moved over a suitable support adjacent the grinding-wheel, a shaftjournaled thereon, a work-holder on the outer end of the shaft, a gear-wheel mounted adjacent the gear-wheel on the end of the grinding-wheel shaft and meshing therewith and flexible gearing connecting thisge'ar-wheel and the inner-end of the shaft carrying the work-ho1der. V

In testimony whereof I have hereunto set my hand in the presence of two witnesses. GEORGE L. JONES. Witnessesfl WM. DU VAL BROWN, W. A. THORNBURG. 

